X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 17 Sep 2007 18:22:49 -0400 Message-ID: X-Original-Return-Path: Received: from mail379c35.nsolutionszone.com ([209.235.151.149] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with ESMTPS id 2335800 for lml@lancaironline.net; Mon, 17 Sep 2007 12:27:58 -0400 Received-SPF: neutral receiver=logan.com; client-ip=209.235.151.149; envelope-from=rsmiley2@centurytel.net X-Authenticated-User: rsmiley2.centurytel.net Received: from PC294771894831 (d7-105.rb.gh.centurytel.net [69.29.198.105]) (authenticated bits=0) by mail379c35.nsolutionszone.com (8.13.6.20060614/8.13.1) with ESMTP id l8HGR3Ks014741 for ; Mon, 17 Sep 2007 16:27:05 GMT X-Original-Message-ID: <001401c7f947$8a042470$650aa8c0@PC294771894831> From: "Bob Smiley" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Flap vs Aileron Edge in Level Cruise (LIVP)...Not Flush X-Original-Date: Mon, 17 Sep 2007 09:26:42 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0011_01C7F90C.DBE76FD0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 This is a multi-part message in MIME format. ------=_NextPart_000_0011_01C7F90C.DBE76FD0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Flap vs Aileron Edge in Level Cruise (LIVP)...Not FlushRaise the left = flap up half way. Test fly the plane. You will probably need to make = several adjustments. It is possibly your ailerons and flaps are = creating compensating lift forces thus increasing drag. Adjust flaps = till both right and left aileron/flap differences are the same. You are = now balanced on lift from right to left side. If you do not get this = situation; then your wings are twisted and have differential angle of = attack. Assuming you have now balanced lift forces on each side. You now make = equal flap adjustments to raise or lower flaps to maximize cruise speed. You can also check wing incidence from leading edge to top trailing edge = of wing by constructing an incidence meter. You make a V block ie cut a V ( of sifficient size to capture the wing = leading edge) into the side of a 1x4; attach it at right angles to the = end of a 1x4x? of sufficient length to span the wing chord at the wing = root. The V notch shall be parallel to the long 1x4. Use another = (adjustable) 1x1 or whatever sharpened to a point on the lower end and = of sufficient length to touch the wing trailing edge while the 1x4 = spanning the wing will not touch the highest point of the top wing = surface. Attached the 1x1 at right angles to the long 1x4 so that the = point is touching near the wing top trailing edge. Use a digital smart = level and record the angle (to the nearest 10th of a degree) for both = right and left wing at the wing root. Repeat the process at two or = three other equal station points on both wings. The angles should be = the same for each matching station points. Else you have twisted wings = creating unequal lift. You will need differential flap adjustments to = compensate. Good luck. ------=_NextPart_000_0011_01C7F90C.DBE76FD0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Flap vs Aileron Edge in Level Cruise (LIVP)...Not = Flush
Raise the left flap up half way. Test = fly the=20 plane.  You will probably need to make several adjustments.  = It is=20 possibly your ailerons and flaps are creating compensating lift forces = thus=20 increasing drag. Adjust flaps till both right and left aileron/flap = differences=20 are the same.  You are now balanced on lift from right to left = side. =20 If you do not get this situation; then your wings are twisted and have=20 differential angle of attack.
 
Assuming you have now balanced lift = forces on each=20 side.  You now make equal flap adjustments to raise or lower flaps = to=20 maximize cruise speed.
 
You can also check wing incidence from = leading edge=20 to top trailing edge of wing by constructing an incidence = meter.
 
You make a V block ie cut a V ( of = sifficient size=20 to capture the wing leading edge) into the side of a 1x4; attach it at = right=20 angles to the end of a 1x4x?  of sufficient length  to = span the=20 wing chord at the wing root.  The V notch shall be parallel to the = long=20 1x4.  Use another (adjustable) 1x1 or whatever sharpened to a = point on=20 the lower end and of sufficient length to touch the wing trailing edge = while the=20 1x4 spanning the wing will not touch the highest point of the top wing=20 surface.  Attached the 1x1 at right angles to the long 1x4 so that = the=20 point is touching near the wing top trailing edge.  Use a digital = smart=20 level and record the angle (to the nearest 10th of a degree) for = both right=20 and left wing at the wing root.  Repeat the process at two or three = other=20 equal station points on both wings.  The angles should be the same = for each=20 matching station points. Else you have twisted wings creating unequal=20 lift.  You will need differential flap adjustments to=20 compensate.
 
Good luck.
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